Hi Artur,
On Fri, Dec 25, 2020 at 11:41:04AM +0000, Artur Petrosyan wrote:
> > @@ -251,7 +251,12 @@ static int dwc2_lowlevel_hw_init(struct dwc2_hsotg
> > *hsotg)
> > }
> >
> > if (!hsotg->phy) {
> > - hsotg->uphy = devm_usb_get_phy(hsotg->dev, USB_PHY_TYPE_USB2);
> > + if (hsotg->dev->of_node)
> > + i = of_property_match_string(hsotg->dev->of_node,
> > "phy-names", "usb2-phy");
>
> According the device tree you have provided the value of "i" will always
> be "0".
Yes
> > + if (hsotg->dev->of_node && i >= 0)
> > + hsotg->uphy = devm_usb_get_phy_by_phandle(hsotg->dev,
> > "phys", i);
>
> Why do you use the value of "i" while in "<&usb_phy0>" you have only one
> phy. If you had several phy-names and the value of "i" gets more than 0,
> then based on your usb_phy0 "devm_usb_get_phy_by_phandle" function will
> return error. So, maybe it would be more correct (based on your device
> tree), to use below command
> hsotg->uphy = devm_usb_get_phy_by_phandle(hsotg->dev, "phys", 0);
Yes I could use 0 instead of i, but I would like this to work not only
for my case where the "usb2-phy" phandle comes first.
I've tried to follow what's done in phy-core.c, as done by the function
phy_get. Where it first call "of_property_match_string" and then get the
phy with the matched index.
I don't see how, in my case, the function "devm_usb_get_phy_by_phandle" can
be called with i greater than 0, and returning an error.
Best,
Jules
